git.oblomov.eu Git - ikiwiki/blob - IkiWiki.pm

   1 #!/usr/bin/perl
   2
   3 package IkiWiki;
   4
   5 use warnings;
   6 use strict;
   7 use Encode;
   8 use HTML::Entities;
   9 use URI::Escape q{uri_escape_utf8};
  10 use POSIX;
  11 use Storable;
  12 use open qw{:utf8 :std};
  13
  14 use vars qw{%config %links %oldlinks %pagemtime %pagectime %pagecase
  15             %pagestate %renderedfiles %oldrenderedfiles %pagesources
  16             %destsources %depends %hooks %forcerebuild $gettext_obj
  17             %loaded_plugins};
  18
  19 use Exporter q{import};
  20 our @EXPORT = qw(hook debug error template htmlpage add_depends pagespec_match
  21                  bestlink htmllink readfile writefile pagetype srcfile pagename
  22                  displaytime will_render gettext urlto targetpage
  23                  add_underlay
  24                  %config %links %pagestate %renderedfiles
  25                  %pagesources %destsources);
  26 our $VERSION = 2.00; # plugin interface version, next is ikiwiki version
  27 our $version='unknown'; # VERSION_AUTOREPLACE done by Makefile, DNE
  28 my $installdir=''; # INSTALLDIR_AUTOREPLACE done by Makefile, DNE
  29
  30 # Optimisation.
  31 use Memoize;
  32 memoize("abs2rel");
  33 memoize("pagespec_translate");
  34 memoize("file_pruned");
  35
  36 sub getsetup () { #{{{
  37         wikiname => {
  38                 type => "string",
  39                 default => "wiki",
  40                 description => "name of the wiki",
  41                 safe => 1,
  42                 rebuild => 1,
  43         },
  44         adminemail => {
  45                 type => "string",
  46                 default => undef,
  47                 example => 'me@example.com',
  48                 description => "contact email for wiki",
  49                 safe => 1,
  50                 rebuild => 0,
  51         },
  52         adminuser => {
  53                 type => "string",
  54                 default => [],
  55                 description => "users who are wiki admins",
  56                 safe => 1,
  57                 rebuild => 0,
  58         },
  59         banned_users => {
  60                 type => "string",
  61                 default => [],
  62                 description => "users who are banned from the wiki",
  63                 safe => 1,
  64                 rebuild => 0,
  65         },
  66         srcdir => {
  67                 type => "string",
  68                 default => undef,
  69                 example => "$ENV{HOME}/wiki",
  70                 description => "where the source of the wiki is located",
  71                 safe => 0, # path
  72                 rebuild => 1,
  73         },
  74         destdir => {
  75                 type => "string",
  76                 default => undef,
  77                 example => "/var/www/wiki",
  78                 description => "where to build the wiki",
  79                 safe => 0, # path
  80                 rebuild => 1,
  81         },
  82         url => {
  83                 type => "string",
  84                 default => '',
  85                 example => "http://example.com/wiki",
  86                 description => "base url to the wiki",
  87                 safe => 1,
  88                 rebuild => 1,
  89         },
  90         cgiurl => {
  91                 type => "string",
  92                 default => '',
  93                 example => "http://example.com/wiki/ikiwiki.cgi",
  94                 description => "url to the ikiwiki.cgi",
  95                 safe => 1,
  96                 rebuild => 1,
  97         },
  98         cgi_wrapper => {
  99                 type => "string",
 100                 default => '',
 101                 example => "/var/www/wiki/ikiwiki.cgi",
 102                 description => "cgi wrapper to generate",
 103                 safe => 0, # file
 104                 rebuild => 0,
 105         },
 106         cgi_wrappermode => {
 107                 type => "string",
 108                 default => '06755',
 109                 description => "mode for cgi_wrapper (can safely be made suid)",
 110                 safe => 0,
 111                 rebuild => 0,
 112         },
 113         rcs => {
 114                 type => "string",
 115                 default => '',
 116                 description => "rcs backend to use",
 117                 safe => 0, # don't allow overriding
 118                 rebuild => 0,
 119         },
 120         default_plugins => {
 121                 type => "internal",
 122                 default => [qw{mdwn link inline htmlscrubber passwordauth
 123                                 openid signinedit lockedit conditional
 124                                 recentchanges parentlinks}],
 125                 description => "plugins to enable by default",
 126                 safe => 0,
 127                 rebuild => 1,
 128         },
 129         add_plugins => {
 130                 type => "string",
 131                 default => [],
 132                 description => "plugins to add to the default configuration",
 133                 safe => 1,
 134                 rebuild => 1,
 135         },
 136         disable_plugins => {
 137                 type => "string",
 138                 default => [],
 139                 description => "plugins to disable",
 140                 safe => 1,
 141                 rebuild => 1,
 142         },
 143         templatedir => {
 144                 type => "string",
 145                 default => "$installdir/share/ikiwiki/templates",
 146                 description => "location of template files",
 147                 advanced => 1,
 148                 safe => 0, # path
 149                 rebuild => 1,
 150         },
 151         underlaydir => {
 152                 type => "string",
 153                 default => "$installdir/share/ikiwiki/basewiki",
 154                 description => "base wiki source location",
 155                 advanced => 1,
 156                 safe => 0, # path
 157                 rebuild => 0,
 158         },
 159         wrappers => {
 160                 type => "internal",
 161                 default => [],
 162                 description => "wrappers to generate",
 163                 safe => 0,
 164                 rebuild => 0,
 165         },
 166         underlaydirs => {
 167                 type => "internal",
 168                 default => [],
 169                 description => "additional underlays to use",
 170                 safe => 0,
 171                 rebuild => 0,
 172         },
 173         verbose => {
 174                 type => "boolean",
 175                 example => 1,
 176                 description => "display verbose messages when building?",
 177                 safe => 1,
 178                 rebuild => 0,
 179         },
 180         syslog => {
 181                 type => "boolean",
 182                 example => 1,
 183                 description => "log to syslog?",
 184                 safe => 1,
 185                 rebuild => 0,
 186         },
 187         usedirs => {
 188                 type => "boolean",
 189                 default => 1,
 190                 description => "create output files named page/index.html?",
 191                 safe => 0, # changing requires manual transition
 192                 rebuild => 1,
 193         },
 194         prefix_directives => {
 195                 type => "boolean",
 196                 default => 0,
 197                 description => "use '!'-prefixed preprocessor directives?",
 198                 safe => 0, # changing requires manual transition
 199                 rebuild => 1,
 200         },
 201         discussion => {
 202                 type => "boolean",
 203                 default => 1,
 204                 description => "enable Discussion pages?",
 205                 safe => 1,
 206                 rebuild => 1,
 207         },
 208         sslcookie => {
 209                 type => "boolean",
 210                 default => 0,
 211                 description => "only send cookies over SSL connections?",
 212                 advanced => 1,
 213                 safe => 1,
 214                 rebuild => 0,
 215         },
 216         default_pageext => {
 217                 type => "string",
 218                 default => "mdwn",
 219                 description => "extension to use for new pages",
 220                 safe => 0, # not sanitized
 221                 rebuild => 0,
 222         },
 223         htmlext => {
 224                 type => "string",
 225                 default => "html",
 226                 description => "extension to use for html files",
 227                 safe => 0, # not sanitized
 228                 rebuild => 1,
 229         },
 230         timeformat => {
 231                 type => "string",
 232                 default => '%c',
 233                 description => "strftime format string to display date",
 234                 advanced => 1,
 235                 safe => 1,
 236                 rebuild => 1,
 237         },
 238         locale => {
 239                 type => "string",
 240                 default => undef,
 241                 example => "en_US.UTF-8",
 242                 description => "UTF-8 locale to use",
 243                 advanced => 1,
 244                 safe => 0,
 245                 rebuild => 1,
 246         },
 247         userdir => {
 248                 type => "string",
 249                 default => "",
 250                 example => "users",
 251                 description => "put user pages below specified page",
 252                 safe => 1,
 253                 rebuild => 1,
 254         },
 255         numbacklinks => {
 256                 type => "integer",
 257                 default => 10,
 258                 description => "how many backlinks to show before hiding excess (0 to show all)",
 259                 safe => 1,
 260                 rebuild => 1,
 261         },
 262         hardlink => {
 263                 type => "boolean",
 264                 default => 0,
 265                 description => "attempt to hardlink source files? (optimisation for large files)",
 266                 advanced => 1,
 267                 safe => 0, # paranoia
 268                 rebuild => 0,
 269         },
 270         umask => {
 271                 type => "integer",
 272                 description => "",
 273                 example => "022",
 274                 description => "force ikiwiki to use a particular umask",
 275                 advanced => 1,
 276                 safe => 0, # paranoia
 277                 rebuild => 0,
 278         },
 279         libdir => {
 280                 type => "string",
 281                 default => "",
 282                 example => "$ENV{HOME}/.ikiwiki/",
 283                 description => "extra library and plugin directory",
 284                 advanced => 1,
 285                 safe => 0, # directory
 286                 rebuild => 0,
 287         },
 288         ENV => {
 289                 type => "string",
 290                 default => {},
 291                 description => "environment variables",
 292                 safe => 0, # paranoia
 293                 rebuild => 0,
 294         },
 295         exclude => {
 296                 type => "string",
 297                 default => undef,
 298                 example => '\.wav$',
 299                 description => "regexp of source files to ignore",
 300                 advanced => 1,
 301                 safe => 0, # regexp
 302                 rebuild => 1,
 303         },
 304         wiki_file_prune_regexps => {
 305                 type => "internal",
 306                 default => [qr/(^|\/)\.\.(\/|$)/, qr/^\./, qr/\/\./,
 307                         qr/\.x?html?$/, qr/\.ikiwiki-new$/,
 308                         qr/(^|\/).svn\//, qr/.arch-ids\//, qr/{arch}\//,
 309                         qr/(^|\/)_MTN\//,
 310                         qr/\.dpkg-tmp$/],
 311                 description => "regexps of source files to ignore",
 312                 safe => 0,
 313                 rebuild => 1,
 314         },
 315         wiki_file_chars => {
 316                 type => "string",
 317                 description => "specifies the characters that are allowed in source filenames",
 318                 default => "-[:alnum:]+/.:_",
 319                 safe => 0,
 320                 rebuild => 1,
 321         },
 322         wiki_file_regexp => {
 323                 type => "internal",
 324                 description => "regexp of legal source files",
 325                 safe => 0,
 326                 rebuild => 1,
 327         },
 328         web_commit_regexp => {
 329                 type => "internal",
 330                 default => qr/^web commit (by (.*?(?=: |$))|from (\d+\.\d+\.\d+\.\d+)):?(.*)/,
 331                 description => "regexp to parse web commits from logs",
 332                 safe => 0,
 333                 rebuild => 0,
 334         },
 335         cgi => {
 336                 type => "internal",
 337                 default => 0,
 338                 description => "run as a cgi",
 339                 safe => 0,
 340                 rebuild => 0,
 341         },
 342         cgi_disable_uploads => {
 343                 type => "internal",
 344                 default => 1,
 345                 description => "whether CGI should accept file uploads",
 346                 safe => 0,
 347                 rebuild => 0,
 348         },
 349         post_commit => {
 350                 type => "internal",
 351                 default => 0,
 352                 description => "run as a post-commit hook",
 353                 safe => 0,
 354                 rebuild => 0,
 355         },
 356         rebuild => {
 357                 type => "internal",
 358                 default => 0,
 359                 description => "running in rebuild mode",
 360                 safe => 0,
 361                 rebuild => 0,
 362         },
 363         setup => {
 364                 type => "internal",
 365                 default => undef,
 366                 description => "running in setup mode",
 367                 safe => 0,
 368                 rebuild => 0,
 369         },
 370         refresh => {
 371                 type => "internal",
 372                 default => 0,
 373                 description => "running in refresh mode",
 374                 safe => 0,
 375                 rebuild => 0,
 376         },
 377         getctime => {
 378                 type => "internal",
 379                 default => 0,
 380                 description => "running in getctime mode",
 381                 safe => 0,
 382                 rebuild => 0,
 383         },
 384         w3mmode => {
 385                 type => "internal",
 386                 default => 0,
 387                 description => "running in w3mmode",
 388                 safe => 0,
 389                 rebuild => 0,
 390         },
 391         setupfile => {
 392                 type => "internal",
 393                 default => undef,
 394                 description => "path to setup file",
 395                 safe => 0,
 396                 rebuild => 0,
 397         },
 398 } #}}}
 399
 400 sub defaultconfig () { #{{{
 401         my %s=getsetup();
 402         my @ret;
 403         foreach my $key (keys %s) {
 404                 push @ret, $key, $s{$key}->{default};
 405         }
 406         use Data::Dumper;
 407         return @ret;
 408 } #}}}
 409
 410 sub checkconfig () { #{{{
 411         # locale stuff; avoid LC_ALL since it overrides everything
 412         if (defined $ENV{LC_ALL}) {
 413                 $ENV{LANG} = $ENV{LC_ALL};
 414                 delete $ENV{LC_ALL};
 415         }
 416         if (defined $config{locale}) {
 417                 if (POSIX::setlocale(&POSIX::LC_ALL, $config{locale})) {
 418                         $ENV{LANG}=$config{locale};
 419                         $gettext_obj=undef;
 420                 }
 421         }
 422
 423         if (! defined $config{wiki_file_regexp}) {
 424                 $config{wiki_file_regexp}=qr/(^[$config{wiki_file_chars}]+$)/;
 425         }
 426
 427         if (ref $config{ENV} eq 'HASH') {
 428                 foreach my $val (keys %{$config{ENV}}) {
 429                         $ENV{$val}=$config{ENV}{$val};
 430                 }
 431         }
 432
 433         if ($config{w3mmode}) {
 434                 eval q{use Cwd q{abs_path}};
 435                 error($@) if $@;
 436                 $config{srcdir}=possibly_foolish_untaint(abs_path($config{srcdir}));
 437                 $config{destdir}=possibly_foolish_untaint(abs_path($config{destdir}));
 438                 $config{cgiurl}="file:///\$LIB/ikiwiki-w3m.cgi/".$config{cgiurl}
 439                         unless $config{cgiurl} =~ m!file:///!;
 440                 $config{url}="file://".$config{destdir};
 441         }
 442
 443         if ($config{cgi} && ! length $config{url}) {
 444                 error(gettext("Must specify url to wiki with --url when using --cgi"));
 445         }
 446
 447         $config{wikistatedir}="$config{srcdir}/.ikiwiki"
 448                 unless exists $config{wikistatedir};
 449
 450         if (defined $config{umask}) {
 451                 umask(possibly_foolish_untaint($config{umask}));
 452         }
 453
 454         run_hooks(checkconfig => sub { shift->() });
 455
 456         return 1;
 457 } #}}}
 458
 459 sub listplugins () { #{{{
 460         my %ret;
 461
 462         foreach my $dir (@INC, $config{libdir}) {
 463                 next unless defined $dir && length $dir;
 464                 foreach my $file (glob("$dir/IkiWiki/Plugin/*.pm")) {
 465                         my ($plugin)=$file=~/.*\/(.*)\.pm$/;
 466                         $ret{$plugin}=1;
 467                 }
 468         }
 469         foreach my $dir ($config{libdir}, "$installdir/lib/ikiwiki") {
 470                 next unless defined $dir && length $dir;
 471                 foreach my $file (glob("$dir/plugins/*")) {
 472                         $ret{basename($file)}=1 if -x $file;
 473                 }
 474         }
 475
 476         return keys %ret;
 477 } #}}}
 478
 479 sub loadplugins () { #{{{
 480         if (defined $config{libdir} && length $config{libdir}) {
 481                 unshift @INC, possibly_foolish_untaint($config{libdir});
 482         }
 483
 484         foreach my $plugin (@{$config{default_plugins}}, @{$config{add_plugins}}) {
 485                 loadplugin($plugin);
 486         }
 487
 488         if ($config{rcs}) {
 489                 if (exists $IkiWiki::hooks{rcs}) {
 490                         error(gettext("cannot use multiple rcs plugins"));
 491                 }
 492                 loadplugin($config{rcs});
 493         }
 494         if (! exists $IkiWiki::hooks{rcs}) {
 495                 loadplugin("norcs");
 496         }
 497
 498         run_hooks(getopt => sub { shift->() });
 499         if (grep /^-/, @ARGV) {
 500                 print STDERR "Unknown option: $_\n"
 501                         foreach grep /^-/, @ARGV;
 502                 usage();
 503         }
 504
 505         return 1;
 506 } #}}}
 507
 508 sub loadplugin ($) { #{{{
 509         my $plugin=shift;
 510
 511         return if grep { $_ eq $plugin} @{$config{disable_plugins}};
 512
 513         foreach my $dir (defined $config{libdir} ? possibly_foolish_untaint($config{libdir}) : undef,
 514                          "$installdir/lib/ikiwiki") {
 515                 if (defined $dir && -x "$dir/plugins/$plugin") {
 516                         require IkiWiki::Plugin::external;
 517                         import IkiWiki::Plugin::external "$dir/plugins/$plugin";
 518                         $loaded_plugins{$plugin}=1;
 519                         return 1;
 520                 }
 521         }
 522
 523         my $mod="IkiWiki::Plugin::".possibly_foolish_untaint($plugin);
 524         eval qq{use $mod};
 525         if ($@) {
 526                 error("Failed to load plugin $mod: $@");
 527         }
 528         $loaded_plugins{$plugin}=1;
 529         return 1;
 530 } #}}}
 531
 532 sub error ($;$) { #{{{
 533         my $message=shift;
 534         my $cleaner=shift;
 535         log_message('err' => $message) if $config{syslog};
 536         if (defined $cleaner) {
 537                 $cleaner->();
 538         }
 539         die $message."\n";
 540 } #}}}
 541
 542 sub debug ($) { #{{{
 543         return unless $config{verbose};
 544         return log_message(debug => @_);
 545 } #}}}
 546
 547 my $log_open=0;
 548 sub log_message ($$) { #{{{
 549         my $type=shift;
 550
 551         if ($config{syslog}) {
 552                 require Sys::Syslog;
 553                 if (! $log_open) {
 554                         Sys::Syslog::setlogsock('unix');
 555                         Sys::Syslog::openlog('ikiwiki', '', 'user');
 556                         $log_open=1;
 557                 }
 558                 return eval {
 559                         Sys::Syslog::syslog($type, "[$config{wikiname}] %s", join(" ", @_));
 560                 };
 561         }
 562         elsif (! $config{cgi}) {
 563                 return print "@_\n";
 564         }
 565         else {
 566                 return print STDERR "@_\n";
 567         }
 568 } #}}}
 569
 570 sub possibly_foolish_untaint ($) { #{{{
 571         my $tainted=shift;
 572         my ($untainted)=$tainted=~/(.*)/s;
 573         return $untainted;
 574 } #}}}
 575
 576 sub basename ($) { #{{{
 577         my $file=shift;
 578
 579         $file=~s!.*/+!!;
 580         return $file;
 581 } #}}}
 582
 583 sub dirname ($) { #{{{
 584         my $file=shift;
 585
 586         $file=~s!/*[^/]+$!!;
 587         return $file;
 588 } #}}}
 589
 590 sub pagetype ($) { #{{{
 591         my $page=shift;
 592
 593         if ($page =~ /\.([^.]+)$/) {
 594                 return $1 if exists $hooks{htmlize}{$1};
 595         }
 596         return;
 597 } #}}}
 598
 599 sub isinternal ($) { #{{{
 600         my $page=shift;
 601         return exists $pagesources{$page} &&
 602                 $pagesources{$page} =~ /\._([^.]+)$/;
 603 } #}}}
 604
 605 sub pagename ($) { #{{{
 606         my $file=shift;
 607
 608         my $type=pagetype($file);
 609         my $page=$file;
 610         $page=~s/\Q.$type\E*$// if defined $type;
 611         return $page;
 612 } #}}}
 613
 614 sub targetpage ($$) { #{{{
 615         my $page=shift;
 616         my $ext=shift;
 617
 618         if (! $config{usedirs} || $page =~ /^index$/ ) {
 619                 return $page.".".$ext;
 620         } else {
 621                 return $page."/index.".$ext;
 622         }
 623 } #}}}
 624
 625 sub htmlpage ($) { #{{{
 626         my $page=shift;
 627
 628         return targetpage($page, $config{htmlext});
 629 } #}}}
 630
 631 sub srcfile_stat { #{{{
 632         my $file=shift;
 633         my $nothrow=shift;
 634
 635         return "$config{srcdir}/$file", stat(_) if -e "$config{srcdir}/$file";
 636         foreach my $dir (@{$config{underlaydirs}}, $config{underlaydir}) {
 637                 return "$dir/$file", stat(_) if -e "$dir/$file";
 638         }
 639         error("internal error: $file cannot be found in $config{srcdir} or underlay") unless $nothrow;
 640         return;
 641 } #}}}
 642
 643 sub srcfile ($;$) { #{{{
 644         return (srcfile_stat(@_))[0];
 645 } #}}}
 646
 647 sub add_underlay ($) { #{{{
 648         my $dir=shift;
 649
 650         if ($dir=~/^\//) {
 651                 unshift @{$config{underlaydirs}}, $dir;
 652         }
 653         else {
 654                 unshift @{$config{underlaydirs}}, "$config{underlaydir}/../$dir";
 655         }
 656
 657         return 1;
 658 } #}}}
 659
 660 sub readfile ($;$$) { #{{{
 661         my $file=shift;
 662         my $binary=shift;
 663         my $wantfd=shift;
 664
 665         if (-l $file) {
 666                 error("cannot read a symlink ($file)");
 667         }
 668
 669         local $/=undef;
 670         open (my $in, "<", $file) || error("failed to read $file: $!");
 671         binmode($in) if ($binary);
 672         return \*$in if $wantfd;
 673         my $ret=<$in>;
 674         close $in || error("failed to read $file: $!");
 675         return $ret;
 676 } #}}}
 677
 678 sub prep_writefile ($$) { #{{{
 679         my $file=shift;
 680         my $destdir=shift;
 681
 682         my $test=$file;
 683         while (length $test) {
 684                 if (-l "$destdir/$test") {
 685                         error("cannot write to a symlink ($test)");
 686                 }
 687                 $test=dirname($test);
 688         }
 689
 690         my $dir=dirname("$destdir/$file");
 691         if (! -d $dir) {
 692                 my $d="";
 693                 foreach my $s (split(m!/+!, $dir)) {
 694                         $d.="$s/";
 695                         if (! -d $d) {
 696                                 mkdir($d) || error("failed to create directory $d: $!");
 697                         }
 698                 }
 699         }
 700
 701         return 1;
 702 } #}}}
 703
 704 sub writefile ($$$;$$) { #{{{
 705         my $file=shift; # can include subdirs
 706         my $destdir=shift; # directory to put file in
 707         my $content=shift;
 708         my $binary=shift;
 709         my $writer=shift;
 710
 711         prep_writefile($file, $destdir);
 712
 713         my $newfile="$destdir/$file.ikiwiki-new";
 714         if (-l $newfile) {
 715                 error("cannot write to a symlink ($newfile)");
 716         }
 717
 718         my $cleanup = sub { unlink($newfile) };
 719         open (my $out, '>', $newfile) || error("failed to write $newfile: $!", $cleanup);
 720         binmode($out) if ($binary);
 721         if ($writer) {
 722                 $writer->(\*$out, $cleanup);
 723         }
 724         else {
 725                 print $out $content or error("failed writing to $newfile: $!", $cleanup);
 726         }
 727         close $out || error("failed saving $newfile: $!", $cleanup);
 728         rename($newfile, "$destdir/$file") ||
 729                 error("failed renaming $newfile to $destdir/$file: $!", $cleanup);
 730
 731         return 1;
 732 } #}}}
 733
 734 my %cleared;
 735 sub will_render ($$;$) { #{{{
 736         my $page=shift;
 737         my $dest=shift;
 738         my $clear=shift;
 739
 740         # Important security check.
 741         if (-e "$config{destdir}/$dest" && ! $config{rebuild} &&
 742             ! grep { $_ eq $dest } (@{$renderedfiles{$page}}, @{$oldrenderedfiles{$page}})) {
 743                 error("$config{destdir}/$dest independently created, not overwriting with version from $page");
 744         }
 745
 746         if (! $clear || $cleared{$page}) {
 747                 $renderedfiles{$page}=[$dest, grep { $_ ne $dest } @{$renderedfiles{$page}}];
 748         }
 749         else {
 750                 foreach my $old (@{$renderedfiles{$page}}) {
 751                         delete $destsources{$old};
 752                 }
 753                 $renderedfiles{$page}=[$dest];
 754                 $cleared{$page}=1;
 755         }
 756         $destsources{$dest}=$page;
 757
 758         return 1;
 759 } #}}}
 760
 761 sub bestlink ($$) { #{{{
 762         my $page=shift;
 763         my $link=shift;
 764
 765         my $cwd=$page;
 766         if ($link=~s/^\/+//) {
 767                 # absolute links
 768                 $cwd="";
 769         }
 770         $link=~s/\/$//;
 771
 772         do {
 773                 my $l=$cwd;
 774                 $l.="/" if length $l;
 775                 $l.=$link;
 776
 777                 if (exists $links{$l}) {
 778                         return $l;
 779                 }
 780                 elsif (exists $pagecase{lc $l}) {
 781                         return $pagecase{lc $l};
 782                 }
 783         } while $cwd=~s{/?[^/]+$}{};
 784
 785         if (length $config{userdir}) {
 786                 my $l = "$config{userdir}/".lc($link);
 787                 if (exists $links{$l}) {
 788                         return $l;
 789                 }
 790                 elsif (exists $pagecase{lc $l}) {
 791                         return $pagecase{lc $l};
 792                 }
 793         }
 794
 795         #print STDERR "warning: page $page, broken link: $link\n";
 796         return "";
 797 } #}}}
 798
 799 sub isinlinableimage ($) { #{{{
 800         my $file=shift;
 801
 802         return $file =~ /\.(png|gif|jpg|jpeg)$/i;
 803 } #}}}
 804
 805 sub pagetitle ($;$) { #{{{
 806         my $page=shift;
 807         my $unescaped=shift;
 808
 809         if ($unescaped) {
 810                 $page=~s/(__(\d+)__|_)/$1 eq '_' ? ' ' : chr($2)/eg;
 811         }
 812         else {
 813                 $page=~s/(__(\d+)__|_)/$1 eq '_' ? ' ' : "&#$2;"/eg;
 814         }
 815
 816         return $page;
 817 } #}}}
 818
 819 sub titlepage ($) { #{{{
 820         my $title=shift;
 821         # support use w/o %config set
 822         my $chars = defined $config{wiki_file_chars} ? $config{wiki_file_chars} : "-[:alnum:]+/.:_";
 823         $title=~s/([^$chars]|_)/$1 eq ' ' ? '_' : "__".ord($1)."__"/eg;
 824         return $title;
 825 } #}}}
 826
 827 sub linkpage ($) { #{{{
 828         my $link=shift;
 829         my $chars = defined $config{wiki_file_chars} ? $config{wiki_file_chars} : "-[:alnum:]+/.:_";
 830         $link=~s/([^$chars])/$1 eq ' ' ? '_' : "__".ord($1)."__"/eg;
 831         return $link;
 832 } #}}}
 833
 834 sub cgiurl (@) { #{{{
 835         my %params=@_;
 836
 837         return $config{cgiurl}."?".
 838                 join("&amp;", map $_."=".uri_escape_utf8($params{$_}), keys %params);
 839 } #}}}
 840
 841 sub baseurl (;$) { #{{{
 842         my $page=shift;
 843
 844         return "$config{url}/" if ! defined $page;
 845
 846         $page=htmlpage($page);
 847         $page=~s/[^\/]+$//;
 848         $page=~s/[^\/]+\//..\//g;
 849         return $page;
 850 } #}}}
 851
 852 sub abs2rel ($$) { #{{{
 853         # Work around very innefficient behavior in File::Spec if abs2rel
 854         # is passed two relative paths. It's much faster if paths are
 855         # absolute! (Debian bug #376658; fixed in debian unstable now)
 856         my $path="/".shift;
 857         my $base="/".shift;
 858
 859         require File::Spec;
 860         my $ret=File::Spec->abs2rel($path, $base);
 861         $ret=~s/^// if defined $ret;
 862         return $ret;
 863 } #}}}
 864
 865 sub displaytime ($;$) { #{{{
 866         my $time=shift;
 867         my $format=shift;
 868         if (! defined $format) {
 869                 $format=$config{timeformat};
 870         }
 871
 872         # strftime doesn't know about encodings, so make sure
 873         # its output is properly treated as utf8
 874         return decode_utf8(POSIX::strftime($format, localtime($time)));
 875 } #}}}
 876
 877 sub beautify_urlpath ($) { #{{{
 878         my $url=shift;
 879
 880         if ($config{usedirs}) {
 881                 $url =~ s!/index.$config{htmlext}$!/!;
 882         }
 883
 884         # Ensure url is not an empty link, and
 885         # if it's relative, make that explicit to avoid colon confusion.
 886         if ($url !~ /^\//) {
 887                 $url="./$url";
 888         }
 889
 890         return $url;
 891 } #}}}
 892
 893 sub urlto ($$;$) { #{{{
 894         my $to=shift;
 895         my $from=shift;
 896         my $absolute=shift;
 897
 898         if (! length $to) {
 899                 return beautify_urlpath(baseurl($from)."index.$config{htmlext}");
 900         }
 901
 902         if (! $destsources{$to}) {
 903                 $to=htmlpage($to);
 904         }
 905
 906         if ($absolute) {
 907                 return $config{url}.beautify_urlpath("/".$to);
 908         }
 909
 910         my $link = abs2rel($to, dirname(htmlpage($from)));
 911
 912         return beautify_urlpath($link);
 913 } #}}}
 914
 915 sub htmllink ($$$;@) { #{{{
 916         my $lpage=shift; # the page doing the linking
 917         my $page=shift; # the page that will contain the link (different for inline)
 918         my $link=shift;
 919         my %opts=@_;
 920
 921         $link=~s/\/$//;
 922
 923         my $bestlink;
 924         if (! $opts{forcesubpage}) {
 925                 $bestlink=bestlink($lpage, $link);
 926         }
 927         else {
 928                 $bestlink="$lpage/".lc($link);
 929         }
 930
 931         my $linktext;
 932         if (defined $opts{linktext}) {
 933                 $linktext=$opts{linktext};
 934         }
 935         else {
 936                 $linktext=pagetitle(basename($link));
 937         }
 938
 939         return "<span class=\"selflink\">$linktext</span>"
 940                 if length $bestlink && $page eq $bestlink &&
 941                    ! defined $opts{anchor};
 942
 943         if (! $destsources{$bestlink}) {
 944                 $bestlink=htmlpage($bestlink);
 945
 946                 if (! $destsources{$bestlink}) {
 947                         return $linktext unless length $config{cgiurl};
 948                         return "<span class=\"createlink\"><a href=\"".
 949                                 cgiurl(
 950                                         do => "create",
 951                                         page => lc($link),
 952                                         from => $lpage
 953                                 ).
 954                                 "\" rel=\"nofollow\">?</a>$linktext</span>"
 955                 }
 956         }
 957
 958         $bestlink=abs2rel($bestlink, dirname(htmlpage($page)));
 959         $bestlink=beautify_urlpath($bestlink);
 960
 961         if (! $opts{noimageinline} && isinlinableimage($bestlink)) {
 962                 return "<img src=\"$bestlink\" alt=\"$linktext\" />";
 963         }
 964
 965         if (defined $opts{anchor}) {
 966                 $bestlink.="#".$opts{anchor};
 967         }
 968
 969         my @attrs;
 970         if (defined $opts{rel}) {
 971                 push @attrs, ' rel="'.$opts{rel}.'"';
 972         }
 973         if (defined $opts{class}) {
 974                 push @attrs, ' class="'.$opts{class}.'"';
 975         }
 976
 977         return "<a href=\"$bestlink\"@attrs>$linktext</a>";
 978 } #}}}
 979
 980 sub userlink ($) { #{{{
 981         my $user=shift;
 982
 983         my $oiduser=eval { openiduser($user) };
 984         if (defined $oiduser) {
 985                 return "<a href=\"$user\">$oiduser</a>";
 986         }
 987         else {
 988                 eval q{use CGI 'escapeHTML'};
 989                 error($@) if $@;
 990
 991                 return htmllink("", "", escapeHTML(
 992                         length $config{userdir} ? $config{userdir}."/".$user : $user
 993                 ), noimageinline => 1);
 994         }
 995 } #}}}
 996
 997 sub htmlize ($$$$) { #{{{
 998         my $page=shift;
 999         my $destpage=shift;
1000         my $type=shift;
1001         my $content=shift;
1002
1003         my $oneline = $content !~ /\n/;
1004
1005         if (exists $hooks{htmlize}{$type}) {
1006                 $content=$hooks{htmlize}{$type}{call}->(
1007                         page => $page,
1008                         content => $content,
1009                 );
1010         }
1011         else {
1012                 error("htmlization of $type not supported");
1013         }
1014
1015         run_hooks(sanitize => sub {
1016                 $content=shift->(
1017                         page => $page,
1018                         destpage => $destpage,
1019                         content => $content,
1020                 );
1021         });
1022
1023         if ($oneline) {
1024                 # hack to get rid of enclosing junk added by markdown
1025                 # and other htmlizers
1026                 $content=~s/^<p>//i;
1027                 $content=~s/<\/p>$//i;
1028                 chomp $content;
1029         }
1030
1031         return $content;
1032 } #}}}
1033
1034 sub linkify ($$$) { #{{{
1035         my $page=shift;
1036         my $destpage=shift;
1037         my $content=shift;
1038
1039         run_hooks(linkify => sub {
1040                 $content=shift->(
1041                         page => $page,
1042                         destpage => $destpage,
1043                         content => $content,
1044                 );
1045         });
1046
1047         return $content;
1048 } #}}}
1049
1050 our %preprocessing;
1051 our $preprocess_preview=0;
1052 sub preprocess ($$$;$$) { #{{{
1053         my $page=shift; # the page the data comes from
1054         my $destpage=shift; # the page the data will appear in (different for inline)
1055         my $content=shift;
1056         my $scan=shift;
1057         my $preview=shift;
1058
1059         # Using local because it needs to be set within any nested calls
1060         # of this function.
1061         local $preprocess_preview=$preview if defined $preview;
1062
1063         my $handle=sub {
1064                 my $escape=shift;
1065                 my $prefix=shift;
1066                 my $command=shift;
1067                 my $params=shift;
1068                 $params="" if ! defined $params;
1069
1070                 if (length $escape) {
1071                         return "[[$prefix$command $params]]";
1072                 }
1073                 elsif (exists $hooks{preprocess}{$command}) {
1074                         return "" if $scan && ! $hooks{preprocess}{$command}{scan};
1075                         # Note: preserve order of params, some plugins may
1076                         # consider it significant.
1077                         my @params;
1078                         while ($params =~ m{
1079                                 (?:([-\w]+)=)?          # 1: named parameter key?
1080                                 (?:
1081                                         """(.*?)"""     # 2: triple-quoted value
1082                                 |
1083                                         "([^"]+)"       # 3: single-quoted value
1084                                 |
1085                                         (\S+)           # 4: unquoted value
1086                                 )
1087                                 (?:\s+|$)               # delimiter to next param
1088                         }sgx) {
1089                                 my $key=$1;
1090                                 my $val;
1091                                 if (defined $2) {
1092                                         $val=$2;
1093                                         $val=~s/\r\n/\n/mg;
1094                                         $val=~s/^\n+//g;
1095                                         $val=~s/\n+$//g;
1096                                 }
1097                                 elsif (defined $3) {
1098                                         $val=$3;
1099                                 }
1100                                 elsif (defined $4) {
1101                                         $val=$4;
1102                                 }
1103
1104                                 if (defined $key) {
1105                                         push @params, $key, $val;
1106                                 }
1107                                 else {
1108                                         push @params, $val, '';
1109                                 }
1110                         }
1111                         if ($preprocessing{$page}++ > 3) {
1112                                 # Avoid loops of preprocessed pages preprocessing
1113                                 # other pages that preprocess them, etc.
1114                                 return "[[!$command <span class=\"error\">".
1115                                         sprintf(gettext("preprocessing loop detected on %s at depth %i"),
1116                                                 $page, $preprocessing{$page}).
1117                                         "</span>]]";
1118                         }
1119                         my $ret;
1120                         if (! $scan) {
1121                                 $ret=eval {
1122                                         $hooks{preprocess}{$command}{call}->(
1123                                                 @params,
1124                                                 page => $page,
1125                                                 destpage => $destpage,
1126                                                 preview => $preprocess_preview,
1127                                         );
1128                                 };
1129                                 if ($@) {
1130                                         chomp $@;
1131                                         $ret="[[!$command <span class=\"error\">".
1132                                                 gettext("Error").": $@"."</span>]]";
1133                                 }
1134                         }
1135                         else {
1136                                 # use void context during scan pass
1137                                 eval {
1138                                         $hooks{preprocess}{$command}{call}->(
1139                                                 @params,
1140                                                 page => $page,
1141                                                 destpage => $destpage,
1142                                                 preview => $preprocess_preview,
1143                                         );
1144                                 };
1145                                 $ret="";
1146                         }
1147                         $preprocessing{$page}--;
1148                         return $ret;
1149                 }
1150                 else {
1151                         return "[[$prefix$command $params]]";
1152                 }
1153         };
1154
1155         my $regex;
1156         if ($config{prefix_directives}) {
1157                 $regex = qr{
1158                         (\\?)           # 1: escape?
1159                         \[\[(!)         # directive open; 2: prefix
1160                         ([-\w]+)        # 3: command
1161                         (               # 4: the parameters..
1162                                 \s+     # Must have space if parameters present
1163                                 (?:
1164                                         (?:[-\w]+=)?            # named parameter key?
1165                                         (?:
1166                                                 """.*?"""       # triple-quoted value
1167                                                 |
1168                                                 "[^"]+"         # single-quoted value
1169                                                 |
1170                                                 [^\s\]]+        # unquoted value
1171                                         )
1172                                         \s*                     # whitespace or end
1173                                                                 # of directive
1174                                 )
1175                         *)?             # 0 or more parameters
1176                         \]\]            # directive closed
1177                 }sx;
1178         }
1179         else {
1180                 $regex = qr{
1181                         (\\?)           # 1: escape?
1182                         \[\[(!?)        # directive open; 2: optional prefix
1183                         ([-\w]+)        # 3: command
1184                         \s+
1185                         (               # 4: the parameters..
1186                                 (?:
1187                                         (?:[-\w]+=)?            # named parameter key?
1188                                         (?:
1189                                                 """.*?"""       # triple-quoted value
1190                                                 |
1191                                                 "[^"]+"         # single-quoted value
1192                                                 |
1193                                                 [^\s\]]+        # unquoted value
1194                                         )
1195                                         \s*                     # whitespace or end
1196                                                                 # of directive
1197                                 )
1198                         *)              # 0 or more parameters
1199                         \]\]            # directive closed
1200                 }sx;
1201         }
1202
1203         $content =~ s{$regex}{$handle->($1, $2, $3, $4)}eg;
1204         return $content;
1205 } #}}}
1206
1207 sub filter ($$$) { #{{{
1208         my $page=shift;
1209         my $destpage=shift;
1210         my $content=shift;
1211
1212         run_hooks(filter => sub {
1213                 $content=shift->(page => $page, destpage => $destpage,
1214                         content => $content);
1215         });
1216
1217         return $content;
1218 } #}}}
1219
1220 sub indexlink () { #{{{
1221         return "<a href=\"$config{url}\">$config{wikiname}</a>";
1222 } #}}}
1223
1224 my $wikilock;
1225
1226 sub lockwiki (;$) { #{{{
1227         my $wait=@_ ? shift : 1;
1228         # Take an exclusive lock on the wiki to prevent multiple concurrent
1229         # run issues. The lock will be dropped on program exit.
1230         if (! -d $config{wikistatedir}) {
1231                 mkdir($config{wikistatedir});
1232         }
1233         open($wikilock, '>', "$config{wikistatedir}/lockfile") ||
1234                 error ("cannot write to $config{wikistatedir}/lockfile: $!");
1235         if (! flock($wikilock, 2 | 4)) { # LOCK_EX | LOCK_NB
1236                 if ($wait) {
1237                         debug("wiki seems to be locked, waiting for lock");
1238                         my $wait=600; # arbitrary, but don't hang forever to
1239                                       # prevent process pileup
1240                         for (1..$wait) {
1241                                 return if flock($wikilock, 2 | 4);
1242                                 sleep 1;
1243                         }
1244                         error("wiki is locked; waited $wait seconds without lock being freed (possible stuck process or stale lock?)");
1245                 }
1246                 else {
1247                         return 0;
1248                 }
1249         }
1250         return 1;
1251 } #}}}
1252
1253 sub unlockwiki () { #{{{
1254         return close($wikilock) if $wikilock;
1255         return;
1256 } #}}}
1257
1258 my $commitlock;
1259
1260 sub commit_hook_enabled () { #{{{
1261         open($commitlock, '+>', "$config{wikistatedir}/commitlock") ||
1262                 error("cannot write to $config{wikistatedir}/commitlock: $!");
1263         if (! flock($commitlock, 1 | 4)) { # LOCK_SH | LOCK_NB to test
1264                 close($commitlock) || error("failed closing commitlock: $!");
1265                 return 0;
1266         }
1267         close($commitlock) || error("failed closing commitlock: $!");
1268         return 1;
1269 } #}}}
1270
1271 sub disable_commit_hook () { #{{{
1272         open($commitlock, '>', "$config{wikistatedir}/commitlock") ||
1273                 error("cannot write to $config{wikistatedir}/commitlock: $!");
1274         if (! flock($commitlock, 2)) { # LOCK_EX
1275                 error("failed to get commit lock");
1276         }
1277         return 1;
1278 } #}}}
1279
1280 sub enable_commit_hook () { #{{{
1281         return close($commitlock) if $commitlock;
1282         return;
1283 } #}}}
1284
1285 sub loadindex () { #{{{
1286         %oldrenderedfiles=%pagectime=();
1287         if (! $config{rebuild}) {
1288                 %pagesources=%pagemtime=%oldlinks=%links=%depends=
1289                 %destsources=%renderedfiles=%pagecase=%pagestate=();
1290         }
1291         my $in;
1292         if (! open ($in, "<", "$config{wikistatedir}/indexdb")) {
1293                 if (-e "$config{wikistatedir}/index") {
1294                         system("ikiwiki-transition", "indexdb", $config{srcdir});
1295                         open ($in, "<", "$config{wikistatedir}/indexdb") || return;
1296                 }
1297                 else {
1298                         return;
1299                 }
1300         }
1301         my $ret=Storable::fd_retrieve($in);
1302         if (! defined $ret) {
1303                 return 0;
1304         }
1305         my %index=%$ret;
1306         foreach my $src (keys %index) {
1307                 my %d=%{$index{$src}};
1308                 my $page=pagename($src);
1309                 $pagectime{$page}=$d{ctime};
1310                 if (! $config{rebuild}) {
1311                         $pagesources{$page}=$src;
1312                         $pagemtime{$page}=$d{mtime};
1313                         $renderedfiles{$page}=$d{dest};
1314                         if (exists $d{links} && ref $d{links}) {
1315                                 $links{$page}=$d{links};
1316                                 $oldlinks{$page}=[@{$d{links}}];
1317                         }
1318                         if (exists $d{depends}) {
1319                                 $depends{$page}=$d{depends};
1320                         }
1321                         if (exists $d{state}) {
1322                                 $pagestate{$page}=$d{state};
1323                         }
1324                 }
1325                 $oldrenderedfiles{$page}=[@{$d{dest}}];
1326         }
1327         foreach my $page (keys %pagesources) {
1328                 $pagecase{lc $page}=$page;
1329         }
1330         foreach my $page (keys %renderedfiles) {
1331                 $destsources{$_}=$page foreach @{$renderedfiles{$page}};
1332         }
1333         return close($in);
1334 } #}}}
1335
1336 sub saveindex () { #{{{
1337         run_hooks(savestate => sub { shift->() });
1338
1339         my %hookids;
1340         foreach my $type (keys %hooks) {
1341                 $hookids{$_}=1 foreach keys %{$hooks{$type}};
1342         }
1343         my @hookids=keys %hookids;
1344
1345         if (! -d $config{wikistatedir}) {
1346                 mkdir($config{wikistatedir});
1347         }
1348         my $newfile="$config{wikistatedir}/indexdb.new";
1349         my $cleanup = sub { unlink($newfile) };
1350         open (my $out, '>', $newfile) || error("cannot write to $newfile: $!", $cleanup);
1351         my %index;
1352         foreach my $page (keys %pagemtime) {
1353                 next unless $pagemtime{$page};
1354                 my $src=$pagesources{$page};
1355
1356                 $index{$src}={
1357                         ctime => $pagectime{$page},
1358                         mtime => $pagemtime{$page},
1359                         dest => $renderedfiles{$page},
1360                         links => $links{$page},
1361                 };
1362
1363                 if (exists $depends{$page}) {
1364                         $index{$src}{depends} = $depends{$page};
1365                 }
1366
1367                 if (exists $pagestate{$page}) {
1368                         foreach my $id (@hookids) {
1369                                 foreach my $key (keys %{$pagestate{$page}{$id}}) {
1370                                         $index{$src}{state}{$id}{$key}=$pagestate{$page}{$id}{$key};
1371                                 }
1372                         }
1373                 }
1374         }
1375         my $ret=Storable::nstore_fd(\%index, $out);
1376         return if ! defined $ret || ! $ret;
1377         close $out || error("failed saving to $newfile: $!", $cleanup);
1378         rename($newfile, "$config{wikistatedir}/indexdb") ||
1379                 error("failed renaming $newfile to $config{wikistatedir}/indexdb", $cleanup);
1380
1381         return 1;
1382 } #}}}
1383
1384 sub template_file ($) { #{{{
1385         my $template=shift;
1386
1387         foreach my $dir ($config{templatedir}, "$installdir/share/ikiwiki/templates") {
1388                 return "$dir/$template" if -e "$dir/$template";
1389         }
1390         return;
1391 } #}}}
1392
1393 sub template_params (@) { #{{{
1394         my $filename=template_file(shift);
1395
1396         if (! defined $filename) {
1397                 return if wantarray;
1398                 return "";
1399         }
1400
1401         my @ret=(
1402                 filter => sub {
1403                         my $text_ref = shift;
1404                         ${$text_ref} = decode_utf8(${$text_ref});
1405                 },
1406                 filename => $filename,
1407                 loop_context_vars => 1,
1408                 die_on_bad_params => 0,
1409                 @_
1410         );
1411         return wantarray ? @ret : {@ret};
1412 } #}}}
1413
1414 sub template ($;@) { #{{{
1415         require HTML::Template;
1416         return HTML::Template->new(template_params(@_));
1417 } #}}}
1418
1419 sub misctemplate ($$;@) { #{{{
1420         my $title=shift;
1421         my $pagebody=shift;
1422
1423         my $template=template("misc.tmpl");
1424         $template->param(
1425                 title => $title,
1426                 indexlink => indexlink(),
1427                 wikiname => $config{wikiname},
1428                 pagebody => $pagebody,
1429                 baseurl => baseurl(),
1430                 @_,
1431         );
1432         run_hooks(pagetemplate => sub {
1433                 shift->(page => "", destpage => "", template => $template);
1434         });
1435         return $template->output;
1436 }#}}}
1437
1438 sub hook (@) { # {{{
1439         my %param=@_;
1440
1441         if (! exists $param{type} || ! ref $param{call} || ! exists $param{id}) {
1442                 error 'hook requires type, call, and id parameters';
1443         }
1444
1445         return if $param{no_override} && exists $hooks{$param{type}}{$param{id}};
1446
1447         $hooks{$param{type}}{$param{id}}=\%param;
1448         return 1;
1449 } # }}}
1450
1451 sub run_hooks ($$) { # {{{
1452         # Calls the given sub for each hook of the given type,
1453         # passing it the hook function to call.
1454         my $type=shift;
1455         my $sub=shift;
1456
1457         if (exists $hooks{$type}) {
1458                 my @deferred;
1459                 foreach my $id (keys %{$hooks{$type}}) {
1460                         if ($hooks{$type}{$id}{last}) {
1461                                 push @deferred, $id;
1462                                 next;
1463                         }
1464                         $sub->($hooks{$type}{$id}{call});
1465                 }
1466                 foreach my $id (@deferred) {
1467                         $sub->($hooks{$type}{$id}{call});
1468                 }
1469         }
1470
1471         return 1;
1472 } #}}}
1473
1474 sub rcs_update () { #{{{
1475         $hooks{rcs}{rcs_update}{call}->(@_);
1476 } #}}}
1477
1478 sub rcs_prepedit ($) { #{{{
1479         $hooks{rcs}{rcs_prepedit}{call}->(@_);
1480 } #}}}
1481
1482 sub rcs_commit ($$$;$$) { #{{{
1483         $hooks{rcs}{rcs_commit}{call}->(@_);
1484 } #}}}
1485
1486 sub rcs_commit_staged ($$$) { #{{{
1487         $hooks{rcs}{rcs_commit_staged}{call}->(@_);
1488 } #}}}
1489
1490 sub rcs_add ($) { #{{{
1491         $hooks{rcs}{rcs_add}{call}->(@_);
1492 } #}}}
1493
1494 sub rcs_remove ($) { #{{{
1495         $hooks{rcs}{rcs_remove}{call}->(@_);
1496 } #}}}
1497
1498 sub rcs_rename ($$) { #{{{
1499         $hooks{rcs}{rcs_rename}{call}->(@_);
1500 } #}}}
1501
1502 sub rcs_recentchanges ($) { #{{{
1503         $hooks{rcs}{rcs_recentchanges}{call}->(@_);
1504 } #}}}
1505
1506 sub rcs_diff ($) { #{{{
1507         $hooks{rcs}{rcs_diff}{call}->(@_);
1508 } #}}}
1509
1510 sub rcs_getctime ($) { #{{{
1511         $hooks{rcs}{rcs_getctime}{call}->(@_);
1512 } #}}}
1513
1514 sub globlist_to_pagespec ($) { #{{{
1515         my @globlist=split(' ', shift);
1516
1517         my (@spec, @skip);
1518         foreach my $glob (@globlist) {
1519                 if ($glob=~/^!(.*)/) {
1520                         push @skip, $glob;
1521                 }
1522                 else {
1523                         push @spec, $glob;
1524                 }
1525         }
1526
1527         my $spec=join(' or ', @spec);
1528         if (@skip) {
1529                 my $skip=join(' and ', @skip);
1530                 if (length $spec) {
1531                         $spec="$skip and ($spec)";
1532                 }
1533                 else {
1534                         $spec=$skip;
1535                 }
1536         }
1537         return $spec;
1538 } #}}}
1539
1540 sub is_globlist ($) { #{{{
1541         my $s=shift;
1542         return ( $s =~ /[^\s]+\s+([^\s]+)/ && $1 ne "and" && $1 ne "or" );
1543 } #}}}
1544
1545 sub safequote ($) { #{{{
1546         my $s=shift;
1547         $s=~s/[{}]//g;
1548         return "q{$s}";
1549 } #}}}
1550
1551 sub add_depends ($$) { #{{{
1552         my $page=shift;
1553         my $pagespec=shift;
1554
1555         return unless pagespec_valid($pagespec);
1556
1557         if (! exists $depends{$page}) {
1558                 $depends{$page}=$pagespec;
1559         }
1560         else {
1561                 $depends{$page}=pagespec_merge($depends{$page}, $pagespec);
1562         }
1563
1564         return 1;
1565 } # }}}
1566
1567 sub file_pruned ($$) { #{{{
1568         require File::Spec;
1569         my $file=File::Spec->canonpath(shift);
1570         my $base=File::Spec->canonpath(shift);
1571         $file =~ s#^\Q$base\E/+##;
1572
1573         my $regexp='('.join('|', @{$config{wiki_file_prune_regexps}}).')';
1574         return $file =~ m/$regexp/ && $file ne $base;
1575 } #}}}
1576
1577 sub gettext { #{{{
1578         # Only use gettext in the rare cases it's needed.
1579         if ((exists $ENV{LANG} && length $ENV{LANG}) ||
1580             (exists $ENV{LC_ALL} && length $ENV{LC_ALL}) ||
1581             (exists $ENV{LC_MESSAGES} && length $ENV{LC_MESSAGES})) {
1582                 if (! $gettext_obj) {
1583                         $gettext_obj=eval q{
1584                                 use Locale::gettext q{textdomain};
1585                                 Locale::gettext->domain('ikiwiki')
1586                         };
1587                         if ($@) {
1588                                 print STDERR "$@";
1589                                 $gettext_obj=undef;
1590                                 return shift;
1591                         }
1592                 }
1593                 return $gettext_obj->get(shift);
1594         }
1595         else {
1596                 return shift;
1597         }
1598 } #}}}
1599
1600 sub yesno ($) { #{{{
1601         my $val=shift;
1602
1603         return (defined $val && lc($val) eq gettext("yes"));
1604 } #}}}
1605
1606 sub pagespec_merge ($$) { #{{{
1607         my $a=shift;
1608         my $b=shift;
1609
1610         return $a if $a eq $b;
1611
1612         # Support for old-style GlobLists.
1613         if (is_globlist($a)) {
1614                 $a=globlist_to_pagespec($a);
1615         }
1616         if (is_globlist($b)) {
1617                 $b=globlist_to_pagespec($b);
1618         }
1619
1620         return "($a) or ($b)";
1621 } #}}}
1622
1623 sub pagespec_translate ($) { #{{{
1624         my $spec=shift;
1625
1626         # Support for old-style GlobLists.
1627         if (is_globlist($spec)) {
1628                 $spec=globlist_to_pagespec($spec);
1629         }
1630
1631         # Convert spec to perl code.
1632         my $code="";
1633         while ($spec=~m{
1634                 \s*             # ignore whitespace
1635                 (               # 1: match a single word
1636                         \!              # !
1637                 |
1638                         \(              # (
1639                 |
1640                         \)              # )
1641                 |
1642                         \w+\([^\)]*\)   # command(params)
1643                 |
1644                         [^\s()]+        # any other text
1645                 )
1646                 \s*             # ignore whitespace
1647         }igx) {
1648                 my $word=$1;
1649                 if (lc $word eq 'and') {
1650                         $code.=' &&';
1651                 }
1652                 elsif (lc $word eq 'or') {
1653                         $code.=' ||';
1654                 }
1655                 elsif ($word eq "(" || $word eq ")" || $word eq "!") {
1656                         $code.=' '.$word;
1657                 }
1658                 elsif ($word =~ /^(\w+)\((.*)\)$/) {
1659                         if (exists $IkiWiki::PageSpec::{"match_$1"}) {
1660                                 $code.="IkiWiki::PageSpec::match_$1(\$page, ".safequote($2).", \@_)";
1661                         }
1662                         else {
1663                                 $code.=' 0';
1664                         }
1665                 }
1666                 else {
1667                         $code.=" IkiWiki::PageSpec::match_glob(\$page, ".safequote($word).", \@_)";
1668                 }
1669         }
1670
1671         if (! length $code) {
1672                 $code=0;
1673         }
1674
1675         no warnings;
1676         return eval 'sub { my $page=shift; '.$code.' }';
1677 } #}}}
1678
1679 sub pagespec_match ($$;@) { #{{{
1680         my $page=shift;
1681         my $spec=shift;
1682         my @params=@_;
1683
1684         # Backwards compatability with old calling convention.
1685         if (@params == 1) {
1686                 unshift @params, 'location';
1687         }
1688
1689         my $sub=pagespec_translate($spec);
1690         return IkiWiki::FailReason->new("syntax error in pagespec \"$spec\"") if $@;
1691         return $sub->($page, @params);
1692 } #}}}
1693
1694 sub pagespec_valid ($) { #{{{
1695         my $spec=shift;
1696
1697         my $sub=pagespec_translate($spec);
1698         return ! $@;
1699 } #}}}
1700
1701 sub glob2re ($) { #{{{
1702         my $re=quotemeta(shift);
1703         $re=~s/\\\*/.*/g;
1704         $re=~s/\\\?/./g;
1705         return $re;
1706 } #}}}
1707
1708 package IkiWiki::FailReason;
1709
1710 use overload ( #{{{
1711         '""'    => sub { ${$_[0]} },
1712         '0+'    => sub { 0 },
1713         '!'     => sub { bless $_[0], 'IkiWiki::SuccessReason'},
1714         fallback => 1,
1715 ); #}}}
1716
1717 sub new { #{{{
1718         my $class = shift;
1719         my $value = shift;
1720         return bless \$value, $class;
1721 } #}}}
1722
1723 package IkiWiki::SuccessReason;
1724
1725 use overload ( #{{{
1726         '""'    => sub { ${$_[0]} },
1727         '0+'    => sub { 1 },
1728         '!'     => sub { bless $_[0], 'IkiWiki::FailReason'},
1729         fallback => 1,
1730 ); #}}}
1731
1732 sub new { #{{{
1733         my $class = shift;
1734         my $value = shift;
1735         return bless \$value, $class;
1736 }; #}}}
1737
1738 package IkiWiki::PageSpec;
1739
1740 sub match_glob ($$;@) { #{{{
1741         my $page=shift;
1742         my $glob=shift;
1743         my %params=@_;
1744
1745         my $from=exists $params{location} ? $params{location} : '';
1746
1747         # relative matching
1748         if ($glob =~ m!^\./!) {
1749                 $from=~s#/?[^/]+$##;
1750                 $glob=~s#^\./##;
1751                 $glob="$from/$glob" if length $from;
1752         }
1753
1754         my $regexp=IkiWiki::glob2re($glob);
1755         if ($page=~/^$regexp$/i) {
1756                 if (! IkiWiki::isinternal($page) || $params{internal}) {
1757                         return IkiWiki::SuccessReason->new("$glob matches $page");
1758                 }
1759                 else {
1760                         return IkiWiki::FailReason->new("$glob matches $page, but the page is an internal page");
1761                 }
1762         }
1763         else {
1764                 return IkiWiki::FailReason->new("$glob does not match $page");
1765         }
1766 } #}}}
1767
1768 sub match_internal ($$;@) { #{{{
1769         return match_glob($_[0], $_[1], @_, internal => 1)
1770 } #}}}
1771
1772 sub match_link ($$;@) { #{{{
1773         my $page=shift;
1774         my $link=lc(shift);
1775         my %params=@_;
1776
1777         my $from=exists $params{location} ? $params{location} : '';
1778
1779         # relative matching
1780         if ($link =~ m!^\.! && defined $from) {
1781                 $from=~s#/?[^/]+$##;
1782                 $link=~s#^\./##;
1783                 $link="$from/$link" if length $from;
1784         }
1785
1786         my $links = $IkiWiki::links{$page};
1787         return IkiWiki::FailReason->new("$page has no links") unless $links && @{$links};
1788         my $bestlink = IkiWiki::bestlink($from, $link);
1789         foreach my $p (@{$links}) {
1790                 if (length $bestlink) {
1791                         return IkiWiki::SuccessReason->new("$page links to $link")
1792                                 if $bestlink eq IkiWiki::bestlink($page, $p);
1793                 }
1794                 else {
1795                         return IkiWiki::SuccessReason->new("$page links to page $p matching $link")
1796                                 if match_glob($p, $link, %params);
1797                 }
1798         }
1799         return IkiWiki::FailReason->new("$page does not link to $link");
1800 } #}}}
1801
1802 sub match_backlink ($$;@) { #{{{
1803         return match_link($_[1], $_[0], @_);
1804 } #}}}
1805
1806 sub match_created_before ($$;@) { #{{{
1807         my $page=shift;
1808         my $testpage=shift;
1809
1810         if (exists $IkiWiki::pagectime{$testpage}) {
1811                 if ($IkiWiki::pagectime{$page} < $IkiWiki::pagectime{$testpage}) {
1812                         return IkiWiki::SuccessReason->new("$page created before $testpage");
1813                 }
1814                 else {
1815                         return IkiWiki::FailReason->new("$page not created before $testpage");
1816                 }
1817         }
1818         else {
1819                 return IkiWiki::FailReason->new("$testpage has no ctime");
1820         }
1821 } #}}}
1822
1823 sub match_created_after ($$;@) { #{{{
1824         my $page=shift;
1825         my $testpage=shift;
1826
1827         if (exists $IkiWiki::pagectime{$testpage}) {
1828                 if ($IkiWiki::pagectime{$page} > $IkiWiki::pagectime{$testpage}) {
1829                         return IkiWiki::SuccessReason->new("$page created after $testpage");
1830                 }
1831                 else {
1832                         return IkiWiki::FailReason->new("$page not created after $testpage");
1833                 }
1834         }
1835         else {
1836                 return IkiWiki::FailReason->new("$testpage has no ctime");
1837         }
1838 } #}}}
1839
1840 sub match_creation_day ($$;@) { #{{{
1841         if ((gmtime($IkiWiki::pagectime{shift()}))[3] == shift) {
1842                 return IkiWiki::SuccessReason->new('creation_day matched');
1843         }
1844         else {
1845                 return IkiWiki::FailReason->new('creation_day did not match');
1846         }
1847 } #}}}
1848
1849 sub match_creation_month ($$;@) { #{{{
1850         if ((gmtime($IkiWiki::pagectime{shift()}))[4] + 1 == shift) {
1851                 return IkiWiki::SuccessReason->new('creation_month matched');
1852         }
1853         else {
1854                 return IkiWiki::FailReason->new('creation_month did not match');
1855         }
1856 } #}}}
1857
1858 sub match_creation_year ($$;@) { #{{{
1859         if ((gmtime($IkiWiki::pagectime{shift()}))[5] + 1900 == shift) {
1860                 return IkiWiki::SuccessReason->new('creation_year matched');
1861         }
1862         else {
1863                 return IkiWiki::FailReason->new('creation_year did not match');
1864         }
1865 } #}}}
1866
1867 1